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package com.oracle.graal.python.builtins.objects.contextvars;

import static com.oracle.graal.python.nodes.SpecialMethodNames.J___CLASS_GETITEM__;
import static com.oracle.graal.python.util.PythonUtils.tsLiteral;

import java.util.List;

import com.oracle.graal.python.PythonLanguage;
import com.oracle.graal.python.annotations.HashNotImplemented;
import com.oracle.graal.python.annotations.Slot;
import com.oracle.graal.python.annotations.Slot.SlotKind;
import com.oracle.graal.python.annotations.Slot.SlotSignature;
import com.oracle.graal.python.annotations.Builtin;
import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.Python3Core;
import com.oracle.graal.python.builtins.PythonBuiltinClassType;
import com.oracle.graal.python.builtins.PythonBuiltins;
import com.oracle.graal.python.builtins.objects.type.TpSlots;
import com.oracle.graal.python.nodes.ErrorMessages;
import com.oracle.graal.python.nodes.PRaiseNode;
import com.oracle.graal.python.nodes.attributes.WriteAttributeToPythonObjectNode;
import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
import com.oracle.graal.python.nodes.function.PythonBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonBinaryBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonUnaryBuiltinNode;
import com.oracle.graal.python.runtime.object.PFactory;
import com.oracle.truffle.api.dsl.Bind;
import com.oracle.truffle.api.dsl.GenerateNodeFactory;
import com.oracle.truffle.api.dsl.NodeFactory;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.strings.TruffleString;

@CoreFunctions(extendClasses = PythonBuiltinClassType.ContextVarsToken)
@HashNotImplemented
public final class TokenBuiltins extends PythonBuiltins {
    public static final TpSlots SLOTS = TokenBuiltinsSlotsGen.SLOTS;

    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return TokenBuiltinsFactory.getFactories();
    }

    @Slot(value = SlotKind.tp_new, isComplex = true)
    @SlotSignature(name = "Token", minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    public abstract static class TokenNode extends PythonUnaryBuiltinNode {
        @Specialization
        Object construct(@SuppressWarnings("unused") Object cls,
                        @Bind Node inliningTarget) {
            throw PRaiseNode.raiseStatic(inliningTarget, PythonBuiltinClassType.RuntimeError, ErrorMessages.TOKEN_ONLY_BY_CONTEXTVAR);
        }
    }

    @Builtin(name = "var", isGetter = true, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    public abstract static class VarAttr extends PythonBuiltinNode {
        @Specialization
        public Object doVar(PContextVarsToken self) {
            return self.getVar();
        }
    }

    @Builtin(name = "old_value", isGetter = true, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    public abstract static class OldValueAttr extends PythonBuiltinNode {
        @Specialization
        public Object doOld(PContextVarsToken self) {
            Object oldValue = self.getOldValue();
            return oldValue == null ? PContextVarsToken.MISSING : oldValue;
        }
    }

    private static final TruffleString MISSING_NAME = tsLiteral("MISSING");

    @Override
    public void postInitialize(Python3Core core) {
        super.postInitialize(core);
        WriteAttributeToPythonObjectNode.executeUncached(core.lookupType(PythonBuiltinClassType.ContextVarsToken), MISSING_NAME, PContextVarsToken.MISSING);
    }

    @Builtin(name = J___CLASS_GETITEM__, minNumOfPositionalArgs = 2, isClassmethod = true)
    @GenerateNodeFactory
    public abstract static class ClassGetItemNode extends PythonBinaryBuiltinNode {
        @Specialization
        static Object classGetItem(Object cls, Object key,
                        @Bind PythonLanguage language) {
            return PFactory.createGenericAlias(language, cls, key);
        }
    }
}
